JEE 2021 Solution Series | KTG & Thermodynamics | JEE Physics | Chapterwise Solution #MissionJEE2025

In this series Mohit Sir provides chapter wise solution of Physics questions came in JEE Main 2021 in all attempts | JEE Main 2021 Physics solutions | JEE Main 2021 Complete Physics Solutions | Thermodynamics Solution of JEE Main 2021 | JEE Main 2021 Thermodynamics | Kinetic Theory of Gases | Thermodynamics

Timestamp:
00:00 Introduction
00:10 List of Important Questions
00:22 Feb 2021 attempt Solutions
32:59 March 2021 attempt Solutions
56:23 July 2021 attempt Solutions
01:24:08 Aug 2021 attempt Solutions

#Thermodynamics #JEE2021PYQs #Eduniti
#JEEMain2021Solution #jeemain2021August #JEEMainPhysics
#JEEMain2021 #JEEMain2021Physics #JEEPhysics #JEEMain2021July #JEEMains2021 #jeemain2021Augustattempt #JEE2022 #JEEMain2022 #IITJEE2022

[mohitgoenka]

👉 It costs only Rs 99, to get Physics Chapter wise PYQs (2019 to 2022) in Printable PDF with answer Key, Tests, concepts. Steps to download
1. Install Eduniti APP from Playstore
2. Purchase only Rs 99 course from Store section (validity is forever)

[saurabhbansalll]

Revision Question
February
Q5 8:34 (didn't know how to manipulate Tc in terms of T)
Q12 24:02 (redo)
Q14 27:14 (forgot the meaning of molar heat capacity)
Q15 29:40 (was trying to use mixing formula but we have to do energy conservation)

March
Q5 40:48 (1 vibrational mode gives 2 degree of freedom and you also have to add the translational and rotational degree)
Q13 53:35 (new concept)

July
Q10 1:08:26 (don't have to convert 62 degree to celsius and the answer in end will come in kelvin)
Q12 1:12:28 (new variety of question)

August
Q4 1:30:40 (🤯)
Q9 1:44:00 (assume the limits from P. to P and 0 to V and then replace P with ideal gas equation and maximize)
Q10 1:48:40 (redo)

[purabihazarika]

Feb attempt
12:42 Q6. conceptual questions
19:09 Q9 Didn't clicked in mind
19:23 Q10. Kinetic energy to thermal energy
24:09 Q12 Didn't clicked
27:00 Q13 knew the concept unable to solve
28:00 Q14 Nice questions
32:00 Q15 nice questions... energy conservation
March attempt
34:00 Q1 Silly mistake
42:35 Q5 Degree of freedom conceptual question
44:49 Q7 mixture of gas
46:58 Q8 degree of freedom conceptual question
55:25 Q13 entropy
July attempt
1:01:03 volume conversion
1:05:50 Q7 equipartition law
1:14:44 conceptual
1:20:59 Carnot engine
August attempt
1:28:18 Q3 refrigerator
1:30:57 Q4 buoyant force
1:37:47 Q5 Volume expansion
1:44:47 Q9 maths
1:52:41 onwards all unit conversion and dof

[atomsandhormones]

2:09 (redo), 8:40, 19:36 (redo), 22:12, 24:02, 25:12 (redo), 29:40, 35:23 (good pt), 44:44 (good pt), 49:18 (good pt), 53:45 (good pt), 59:15 (units conversion), 1:03:04 (redo), 1:10:40 (redo), 1:12:36, 1:16:06, 1:30:47 🫡, 1:36:09, 1:44:14, 1:48:54, 1:54:06 (redo)

[aakash]

5:53 19:03 21:37(dont assume given speed is vrms unless told) m=4n)(converting u to g ) 23:46 25:00 29:13(goo d) 32:26(ui=uf) 42:53 55:07 1:01:00(area of circle) 1:05:34(Q meant to find w blw A to B) 1:08:11 1:12:28 1:17:36(check all options) 1:35:51 1:38:06 1:53:47

[Aditya__rajput_]

5:20 good approach, 9:32gq, 12:35, 17:41gq, 19:17k.e will be converted into internal energy, +mistake, 22:19 gq, 24:17, 25:22, 33:24 c, 36:08 good ques, 40:52imp, 45:30, 47:02, 50:34c, 52:55, 54:34imp, 59:23, 1:01:40 mistake, 1:06:08, 1:07:06, 1:13:22, 1:25:59 c, 1:31:25 imp, 1:36:25imp, 1:44:29 v.imp, 1:49:10imp, 1:54:19 imp, 1:57:33

[avinashkashyap]

Feb attempt
12:42 Q6. conceptual questions
19:09 Q9 Didn't clicked in mind
19:23 Q10. Kinetic energy to thermal energy
24:09 Q12 Didn't clicked
27:00 Q13 knew the concept unable to solve
28:00 Q14 Nice questions
32:00 Q15 nice questions... energy conservation

[SHIVAPREETHAM]

KTG&Thermodynamics-REVISE💥
1:29[Good Question]
8:39[Good Question]
14:09[Good Question]
23:56[Do it Once Again]
27:18[Do it Once Again]
29:41[MUST DO]
40:52[NCERT-MUST DO]
44:30[Do it Once Again]
50:49[MUST DO-Graph Based]
53:37[Conceptual]
1:06:32[Do it Once Again]
1:08:26[Calculation]
1:12:30[Do it Once Again*]
1:17:47[Two Methods*]
1:21:04[Good Question]
1:27:43[Do it Once Again*]
1:30:49[Best Question]

[nabanitakundu]

revision questions 22:00: twisting tha phas geeye the
25:00
59:09 Maine galti see 3 kar di thi
1:36:03 (op question) concept pakad nehi paye the
1:41:09 most repeated abhi take dekha plus heat engine see zada question other than refrigerator
1:44:03 imp
1:48:33
1:53:50 op question first mein pakad nehi paye the
1:59:36 v good question
actually last ka questions sab hi imp hain so finally done!
THANK YOU GURUJI JAI SHREE KRISHNA RADHE RADHE JAI MAA MONOSA JAI HIND JAI BHARAT
🙏

[thetrickster]

This 2 hour session is so OP. I did this in the span of 2 days
When a moving container stops its KE converts into the Internal Energy we can use loss in ke = gain in IE
1/2mv^2 = f/2nrdeltaT
Molar heat capacity = deltaQ/nDeltaT
Heat and Work are Path FUnctions
Do graph question by elimination method
Average value of energy for one degree of freedom is 1/2kt we mostly use monoatomic energy that is 3/2KT
Heat engine in series questions are tough for me so I saw some common things used in all those questions
1. Q1/Q2 = T1/T2
2. Always make the diagrams of heat engine with work happening outside of it. then make corresponding heat work equations
3. to relate it with temperature if needed in the question we can divide by Q1 or Q2 the whole heat work equation then we can directly write it in terms of T1 and T2 and identify any variables.
When two gases are in a cylindrical container we can add the number of moles just as a qquantity and use the ideal gas equation.(Keep in mind that the volume and temperature should be constant, one thing can be variable)
DeltaV= gammaVDeltaT from thermal expanison is also used here
Aug 2021 9th Question was very good. It was a differential equation first solve that equation find C. Then apply pvnrt in that then write in terms of temperature then to find maxima minima differentiate it and put it equal to zero.
In finding ratio question when ratio is not direclty seen we can force it like in Question11. sir divided it by m1+m2 and then divided whole equation by m2 forcing m1/m2 then we can take it as x and solve directly rather than first finding m1 and then m2 and then taking ratio.
Calculation is very tough. I almost only did half calculations here only. Half I couldnt do like the Aug attempt calcs

[anhad]

12:19 statement 1
22:03 convert mass into gram
24:49 u did directly by comparing but actual method dekho
32:36 good question
55:02 entropy q in physics
1:00:52 units garbad
1:14:52 repeat
1:26:41 daltons law
1:34:00 good question
1:48:00 repeat DY

[arti.kumari-]

Pressure ya temperature of mixture pucha ho then conservation of internal energy (ui=uf) 32:29, 45:00 1:14:33 ( manipulation of the ideal gas equation in terms of KE) 1:31:03 redo 1:44:23 (redo) 1:51:05 (smart calculation)

[abhijeetaghade]

Modern+ ktg/thermo...
Made it strong ❤️❤️

Thank you sir

[ansariaburehan]

Bhai mazaa aaaya or me yeh maza har hindustani ko dena chahta hu😁 🫀se shukriya sir

[sumantripathi]

1) 1:05
2) 6:00
3) 7:41
4) 8:16
5) t proportional to v 11:38
6) 12:42
7) 14:04
8) 17:24
9) 19:06
10) loss of ke =gas in U 21:53
11) 23:48
\12) 25:01
13) n=1 27:09
14) 29:08
15) ui=uf 32:53


1) 34:09
2) 35:13
3) 38:19, 39:05
4) 40:33
5) 42:56
6) 44:24
7) 45:57 final temp t energy constant
8) 46:54
9) 50:16
10) 50:34
11) 53:30
12) entropy remains same eben after 53:30
13) 55:25
14) 56:20


1) 57:37
2) 58:56
3) 1:01:18 , cyclic delta u=0
4)1:01:49
5) 1:02:55
6) w of isothermal
7) 1:05:38
8) mono=3 1:06:18
9) 1:08:11
10) 1:!0:35
11) 1:!2:21
12) due to low temp diatomic has no rotational .. 1:14:45
13) 1:17:37
14) 1:20:35
15) 1:24:03

1)1:25:26
2) dalton mix of mole 1:27:08
4) 1:35:57
3)1:30:20) fv=mg
5) 1:38:10
6) 1:39:43
7) 1:41:02
8) 1:43:43
9) 1:48:34
10) 1:53:42
11) 1:57:06
12) 1:58:39
13) 2:00:46

[DefinitelyPrateek]

8:35 Imp
11:52 New Concept
12:49
17:32 New Concept
20:05 Mass Kg me hona chahiye
22:10 New Variety
23:56 New Variety
47:09 Imp
53:21 New Variety
54:16 Anokha
1:00:39 Convert Litre into m cube
1metre cube = 1000 litre
1:06:39 : New Variety
1:13:16 New Variety
1:17:29 Good Question
1:30:58 New Variety
1:36:12 New Variety
1:58:38 Imp

[HX]

This is such a easy chapter !
And it's high weightage too 😍😍

You are awesome sir 🙏🏻👌🙏🏻

[kundalaman]

29:18 :- TRICKY 🔥
41:53 :-
1:00:18 :- good
1:06:58 :-👁️
1:14:06 :- manipulations
1:16:12 :- check again 👁️
1:22:40 :-
1:30:26 :- refrigerator problems
1:36:25 :- beautiful manipulations 🔥
1:48:37 :- good

[PeeyushRajan-mcxr]

Q. 6, 12
2...Q.3(formula), 5 (1vb mode=2dof), 13(concept)
15 carnott in series

[RaviKumar-xcye]

q 10 20:21 (energy concept)
q14 24:14 formula of molar hc
q 15 30:00